1) An old-fashioned LP record rotates at 33 1/3 rpm (revolutions per minute) and is 12 inches in diameter. A "single" rotates at 45 rpm and is 7.0 inches in diameter. If a fly sits on the edge of an LP and then on the edge of a single, on which will the fly experience the greater tangential speed?
On the LP? or On the 45? (0/1 submissions used)
2)A hollow glass holiday ornament in the shape of a sphere is suspended on a string that forms an axis of rotation through the ornament's center. If the ornament has mass 0.0074 kg and radius 0.036 m, what is its moment of inertia for an axis that passes through its center?
________kg·m2 (1/5 submissions used)
A planetoid has a mass of 1.510e+21 kg and a radius of 7.00×105 m. Find the magnitude of the gravitational acceleration at the planetoid's surface.
(1/5 submissions used) m/s2
An asteroid orbits the Sun at a constant distance of 4.440e+11 meters. The Sun's mass is 1.99×1030 kg. What is the orbital speed of the asteroid?
(1/5 submissions used) m/s